The first major update of Winamp was Winamp3. It had video support, new skinning system, and a redesign of the plug-in system. Unfortunately, it was poorly received and widely criticized. To fix this embarrassment, Nullsoft decided to integrate Winamp3 skin and script support into the Winamp 2.x platform. Thus, Winamp 2 plus Winamp3 equals Winamp5 (released December 16, 2003). Upon release of Winamp5, Winamp3 was spun off as the Wasabi.player, an open-source equivalent to Nullsoft's Winamp. Wasabi is a mostly open-source (zlib-licensed), cross-platform application framework and skinnable GUI toolkit, developed by Nullsoft.